The entrenching of the processing method on the titanium oxide surface: Aiming at implementation in the water treatment system

2022 Fiscal Year Final Research Report

• Project/Area Number: 19K23538
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Multi-year Fund
• Review Section: 0303:Civil engineering, social systems engineering, safety engineering, disaster prevention engineering, and related fields
• Research Institution: Hokkai-Gakuen University
• Principal Investigator: Ando Naoya 北海学園大学, 工学部, 准教授 (20847595)
• Project Period (FY): 2019-08-30 – 2023-03-31
• Keywords: 光触媒 / アンモニア処理 / 有機物処理 / 酸化処理 / 塩素消費量 / 浄水処理

Outline of Final Research Achievements

In this study, I ①investigated a method for imparting a microcavity and convexity structure to titanium dioxide surfaces, ② confirmed that titanium dioxide with a microcavity and convexity structure removes ammonia, and ③ investigated the effect of ammonia on the surface of titanium dioxide.
In ①, I confirmed that a commercially available organic compound (polymer) as a pore-forming agent can be used to give a concavo-convex structure by sintering. In②, The micro asperity structure improves the removal of dissolved methylene blue and ammonia in water through photocatalysis.　In③, it was found that the photocatalytic reaction decomposes dissolved organic matter and increases the consumption of chlorine added for disinfection purposes.

Free Research Field

土木環境システム関連

Academic Significance and Societal Importance of the Research Achievements

浄水処理システムでの使用実績があるアルミナをベースとしたセラミック基材への酸化チタンの修飾を行う。修飾と同時に酸化チタンの焼結を行うが、予め酸化チタンと有機物を混合することで、焼結時に有機物を燃焼消失させ酸化チタン表面への微細凹凸構造の形成を試みる。本方法が確立できれば、すでに実装されているセラミック製品同様に、工業的に供給することが可能となる。